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Q1. The frequency of an opera singer is 450 Hz. Assume the speed of sound in air is 340 m/s. What is the frequency heard by an observer who is running down the road towards the opera singer with a speed 25.0 m/s?
Q2. Three uniform thin rods, each of length L = 22 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 48 g. Where is the center of mass of the assembly (x, y)?
Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire.
What is the wavelength of the light in the glass
Two packages at UPS start sliding down a ramp 40 degrees from the horizontal, Package A is sliding down in front of Package B. Package A has a mass of 3.50 and a coefficient of kinetic friction of 0.220. Package B has a mass of 8.00 and a coefficient..
Six pendulums of mass and length are released from rest at the similar angle from vertical. Rank the pendulums according to the number of complete cycles of motion each pendulum goes through per minute.
A simple harmonic oscillator consists of the block of mass 1.90 kg attached to a spring of spring constant 196 N/m. while t = 3.00 s, position and velocity of the block are x = +0.129 m and v = +3.415 m/s.
What is an average velocity of the rock
Evaluate the electrostatic energy of two opposite charges
What is coefficient of friction between chair and floor
Treating our rigid legged friend as a particle, what is the average force his feet exert on the ground as he slows down.
What is tension in the wire
Assume that the rod is held at rest horizontally and then released. (Throughout the remainder of this problem, your answer may include the symbol, moment of inertia of the assembly, whether or not you have answered the first part correctly.)
How much farther from the tower does the cannonball from the higher cannon land than cannonball from the lower cannon.
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